Apicogénesis en canino permanente joven con resorción intracoronal pre eruptiva: reporte de caso / Apexogenesis in young permanent canine with pre-eruptive intracoronal resortion: case report

Los dientes permanentes presentan desarrollo y formación radicular incompleta al momento de su erupción, el tejido pulpar es el encargado de culminar el proceso de formación radicular por intermedio de los odontoblastos que producen dentina, si la misma se ve afectada por traumatismo, lesión cariosa, resorción intracoronal pre eruptiva (PEIR por sus siglas en inglés) y/o fractura, se altera la vitalidad e incluso puede llegar a producirse necrosis pulpar, lo que ocasionará una interrupción de la formación radicular normal. Para el tratamiento de dientes permanentes jóvenes e inmaduros que han sufrido algún tipo de lesión, pero que aún mantienen la vitalidad pulpar, el procedimiento de apicogénesis con agregado de trióxido mineral (MTA) puede ser considerado como una opción viable, debido a la biocompatibilidad y capacidad de inducir la formación de tejidos duros. En el presente reporte de caso se presenta una pieza dental con antecedente de PEIR, tratada mediante apicogénesis con MTA, lográndose resultados favorables en cuanto al engrosamiento de paredes dentinales, desarrollo radicular y mantenimiento de la vitalidad pulpar.

The permanent teeth have an incomplete development and root formation at the time of its eruption, the pulp tissue is responsible for completing the process of root formation by means of odontoblasts that produce dentin, if it is affected by trauma, carious lesion, Pre-eruptive intracoronal resorption (PEIR) and / or fracture, pulp vitality is altered and pulp necrosis may even occur, which will cause an interruption of the normal radicular formation. For the treatment of immature permanent teeth that have suffered some type of injury, but still maintain pulp vitality, the procedure of apexogenesis with added mineral trioxide (MTA) can be considered as a viable option, due to the biocompatibility and capacity of induce the formation of hard tissues. In this case report we present a tooth with a history of PEIR, treated by apexogenesis with MTA, achieving favorable results in terms of thickening of dentinal walls, root development and maintenance of pulpal vitality.

Outcome of Regenerative Endodontic Treatment for an Avulsed Immature Permanent Tooth: A Case Report / 대한소아치과학회지

Dental avulsion, defined as the complete displacement of a tooth from the alveolar bone with consequent loss of the blood and nerve supply, was reported as one of the most severe dental injuries. Avulsion can cause tissue ischemia, which leads to pulp necrosis.Apexification is a conventional treatment method that induces an apical calcified barrier in immature roots with pulp necrosis. However, root development characterized by an increase in the root thickness and length cannot be achieved by apexification.The purpose of this case report was to describe the radiographic and clinical outcomes of regenerative endodontic treatment for the avulsed and necrosed permanent tooth with an immature root after replantation in a 5-year-old girl; the treatment was performed using a mixture of ciprofloxacin, metronidazole and cefaclor, CollaTape and Biodentine.

The changes of root length and form in immature teeth after orthodontic treatment / 대한치과교정학회지

Previous studies have focused on the causes of root resorption after orthodontic treatment and treatment methods to reduce this phenomenon, and have been mainly associated with developed, mature roots. As parents become increasingly interested in their children's' dentition, orthodontists are performing fixed orthodontic treatment on patients of less than 10 years and before the completion of the immature root. Thus, the author evaluated the changes of root length and root form of maxillary immature incisors after orthodontic treatment, com-pared with those of mature teeth, and investigated the correlation according to gender, treatment duration, and displacement of incisors. The sample consisted of an immature root group of twenty-eight persons (between 8 and 10 years old) and a mature root group of thirty-one persons (between 11 and 15 years old). The crown and root length of the maxillary four incisors were measured with a periapical radiograph, changes in root length and crown-root ratio were calculated, and root form was classified according to a scoring system. The results were as follows. 1. The development of immature roots was not affected by orthodontic treatment and mostly showed normal root length and apical form. 2. Root length of immature teeth was sustained or became shorter, partially in long treatment duration or with open bite patients. Even though the teeth reached their normal root length, they demonstrated a blunt form. 3. Most of the mature roots showed mild resorption, and the form of mature roots was more blunt than the developed form of the immature roots (p<0.05). 4. The developed form of the immature roots was statistically related to treatment duration, while the form of the mature roots was significantly related to the displacement of incisors (p<0.05). 5. In contrast, other variables such as gender, classification of malocclusion, changes in overbite, and changes of U1 to SN showed no correlation with the root resorption of both groups.